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Income Taxes - Schedule of Income (Loss) before Income Tax, Domestic and Foreign (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract]      
United States $ 144.3 $ 157.3 $ 139.2
Foreign 1.5 (48.6) (14.1)
Income before provision for income taxes and equity in earnings of investee companies $ 145.8 $ 108.7 $ 125.1